None of these are actually Chinese. The three identical ones (the ones with the two characters on the back) are Vietnamese, from the reign of Thanh Thai (1887-1909).
The other coin (bottom left) is Japanese... or perhaps a Vietnamese-made "trade copy" of a Japanese coin.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis